[rescue] Cooling (was S: 512M (4x128M) U5/10 DIMMs)

[Dave McGuire]

On April 15, Big Endian wrote:
> >   In the early days of Digex, we used a Movin-Cool...a 10K BTU indoor
> >a/c on wheels, a little smaller than a washing machine.  It had a big
> >flexible hose (18" or so in diameter) coming out the top that blew out
> >hot air, and a smaller flexible hose (maybe 8" in diameter) that blew
> >out cold air.  Condensate collected in a catch bucket in the bottom of
> >the unit.
> 
> Those things *RULE*  We had one in the wiring/server closet at my 
> last job (sealed room, no ventilation except the A/C unit with the 
> hot pipes up into the ceiling tiles).  That thing got *VERY* cold.

  Kick ass!

> >   These things work *great*, but they're somewhat expensive.  Digex
> >wouldn't have made it past 1993 if it weren't for that Movin-Cool.
> 
> Box/Space ratio?

  Picture a 12'x18' (or so) room containing about nine racks...two racks
full of Sun3/60 boards in 12-slot VME chassis (six 3/60 boards per
chassis, three chassis per rack) running netbooted, two Sun4/300
systems and five Sun4/400 systems, each in a 3/180 rackmount VME
chassis, about fifteen CDC Sabre 8" SMD drives, two CDC PA1A9A 14" SMD
drives (9A/ea continuous), and about six Livingston Portmaster PM2E-30
terminal servers...each with thirty AT&T/Paradyne *external* 14.4Kbps
modems connected to them.  Oh, and about eight VT220 and VT320
terminals.

  This was a *FUCKING LOT* of heat.

      -Dave

-- 
Dave McGuire              "Hush and eat your vegetables, young lady!"
St. Petersburg, FL                          - Mr. Bill